Detonation Velocity Measurements Using Rare-Earth Doped Fibres

In this paper, a simple detonation velocity measurement scheme is presented, which exploits the length-dependent amplified spontaneous emission (ASE) power emitted by off-the-shelf Er-doped fibres. This measurement scheme is first calibrated using cutback tests, so that minimal processing is require...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2019-04, Vol.19 (7), p.1697
Main Authors: Pooley, Josh, Price, Ed, Ferguson, James W, Ibsen, Morten
Format: Article
Language:English
Subjects:
detonation
fibre sensing
rare-earth fibres
velocity sensing
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Summary:In this paper, a simple detonation velocity measurement scheme is presented, which exploits the length-dependent amplified spontaneous emission (ASE) power emitted by off-the-shelf Er-doped fibres. This measurement scheme is first calibrated using cutback tests, so that minimal processing is required between data collection and velocity readout. We then demonstrate the use of this method in an explosive cylinder test and achieve a spatial resolution of approximately ±2 mm, owing to its implementation in a helical geometry. Alongside the standard Er fibres, a specially made, high-concentration Er/Yb-doped fibre is also calibrated, which demonstrates a potential spatial resolution approaching ±20 μ m.
ISSN:1424-8220
1424-8220
DOI:10.3390/s19071697